- The immediate treatment effect is \(Y_{01} - Y_{00}\), that is, the effect of being treated in the current period but not in the preceding period
- We just need to take the numbers from the tables and apply inverse probability weighting again
\[
\begin{aligned}
\widehat{E}[Y_{01} - Y_{00}] &= \frac{\frac{7 + 10}{0.25} + \frac{2 + 1}{0.25} + \frac{7 + 10}{0.25}}{\frac{2}{0.25} + \frac{2}{0.25} + \frac{2}{0.25}} \\
&- \frac{\frac{7 + 1 + 4 + 4 + 3 + 2 + 3}{0.75} + \frac{5 + 3 + 3 + 3}{0.50} + \frac{3 + 4}{0.25}}{\frac{6}{0.75} + \frac{4}{0.50} + \frac{2}{0.25}} = 2.72.
\end{aligned}
\]